Sony VGN-Z540C notebook BIOS Update v.R2168M3 for Windows Vista
This utility updates the BIOS to version R2168M3 and provides the following benefits:
Enhancements:
Improves system performance during startup
Improves the hard disk..

Sony VGN-Z540C notebook Registry Update for CD/DVD Drives v.1.0 for Windows Vista
This utility installs a Registry update to resolve an issue where CD/DVD drives may not appear in My Computer under the following circumstances:
Click to ..

Sony VGN-Z540C notebook Click to Disc Editor Software Update v.2.0.02.06120 for Windows Vista
This utility updates the Click to Disc Editor software to version 2.0.02.06120 and provides the following benefits:
Resolves an issue where DV..

Sony VGN-Z540C notebook Click to Disc Editor Update v.1.2.00.06240 for Windows Vista
This utility updates the Click to Disc Editor software to version 1.2.00.06240 and provides the following benefits:
Resolves an issue where burning ful..

Sony VGN-Z540C notebook Click to Disc Editor Update v.1.2.01.09261 for Windows Vista
This utility updates the Click to Disc Editor software to version 1.2.01.09261 to resolve an issue where the application crashes when importing numerous ph..